5.12 CONTEST OF CLAIM FOR TAX

 (a) If a claim shall be made for or in respect of any Tax
 (including withholding Taxes) for which the Lessee is
 obligated pursuant to Clauses 5.7, 5.8, 5.9 or 5.10, to
 indemnify such Tax Indemnitee (a "Tax Claim"), such Tax
 Indemnitee shall give Lessee written notice of such Tax Claim
 as soon as reasonably practicable, provided that any failure
 of such Tax Indemnitee to give such notice or any delay by
 such Tax Indemnitee in giving such notice shall not affect the
 obligations of Lessee under this Clause 5 unless, and only to
 the extent that, the failure to promptly provide such notice
 results in (A) a material increase in the amount which Lessee

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